ISTEC IST-300 User Manual

IST-300 - User manual
2 channel portable function generator
Manual version
2.0
Date
22-7-2019
Hardware version
IST-300-VC-V02
ISTEC INTERNATIONAL BV | www.istec.com
Netherlands:
Istec International BV
Meer en Duin 8
NL – 2163 HA Lisse
+31 (0)252 433 400
[email protected]
Belgium:
Istec International BVBA
Zendelstraat 6
BE – 3680 Opoeteren
+32 (0)89 303 204
[email protected]
Inhoud
1.
A portable vibration calibrator ....................................................................................................................... 3
2.
A user-friendly hardware interface .............................................................................................................. 4
3.
2.1.
Front panel ...................................................................................................................................... 4
2.2.
Top Panel ......................................................................................................................................... 5
Using the IST-300................................................................................................................................................... 6
3.1.
Turn on the device ........................................................................................................................ 6
3.2.
Connect the output ...................................................................................................................... 6
3.3.
Set vibration signal parameters ................................................................................................. 6
3.4.
Combined output .......................................................................................................................... 7
3.5.
Clipping ............................................................................................................................................ 8
4.
Specifications ......................................................................................................................................................... 9
5.
Declaration of conformity .............................................................................................................................. 10
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1. A portable vibration calibrator
The IST-300 is portable vibration signal simulator to simulate axial
displacement, acceleration and velocity vibration signals (2oo2 testing). The 2channel vibration calibrator sends out a pure sine wave with a programmable
amplitude, frequency and offset. Signals can either be send through field
wiring or directly to the vibration protection system.
The 8-hour battery lifespan and its compact lightweight design makes the IST300 a fast and reliable tool to verify the system logic and safety functions of
vibration protection systems.
Why we designed the IST-300
In a number of situations determining the loop accuracy in the field is required. A simple battery
powered DC voltage simulator allows only static signals to be simulated e.g. axial displacement
and/or bias voltage. For dynamic acceleration, velocity and/or radial vibration signals a function
generator is needed. The standard available function generators, specific portable versions, do not
allow a sufficient DC span in combination with AC superimposed signals.
The IST-300 vibration calibrator solves these issues.
Figure 1 – IST 300: Two channel calibrator
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2. A user-friendly hardware interface
2.1. Front panel
The front panel consists of two parallel simulator units. Each channel consists of:
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LCD display 1 – Shows frequency value
LCD display 2 – Shows AC amplitude value
LCD display 3 – Shows DC offset value
Peak output LED– Lights up when output is clipping (See 3.5)
Display switch – To toggle between the LCD displays for setting the right values
Output switch – To toggle between RMS or peak-to-peak
Incremental rotary knob – For adjusting the values of the LCD displays
Figure 2 – Hardware interface
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2.2. Top Panel
Figure 3 – Top View
At the top we find the following switches and sockets:
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One polarity switch per channel – To define the output voltage: positive or negative.
Power on / off switch – To turn on and off the device
One BNC output per channel (50 Ohm) – To connect the output to the device to be tested
Power input socket – To connect the adapter for charging the battery
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3. Using the IST-300
To use the IST-300 either the batteries need to be charged or the unit needs to be connected to the
power adapter. The interface is very user-friendly and identical for both channels.
3.1. Turn on the device
After turning on the IST-300 by toggling the power switch, several data is shown on the LCD
displays. These values are only for startup purposes. You will see the following data:
Channel 1
Channel 2
Display 1
Serial number PCB (project number)
Display 1
Serial number PCB (project number)
Display 2
Serial number PCB
Display 2
Serial number PCB
Display 3
Shows 1.000
Display 3
Shows 0.000
Note: Battery status is shown every 60s in display 1 of channel 1.
3.2. Connect the output
Connect the BNC output(s) to the device to be tested.
Note: Power output signals needs either to be disconnected or switched off.
For ICP loops the power mode on the device to be tested needs to be switched to off or to
external.
3.3. Set vibration signal parameters
To simulate the right vibration signal, 3 parameters need to be set correctly:
1. Frequency
2. Amplitude
3. Offset
The values of these parameters are shown in the LCD displays and can be
changed via the rotary knob. To change the value of one of the settings you
first need to select the right parameter using the Display switch. An indicator
is shown in the top left corner of the LCD display indicating which display is
selected. After selecting the right parameter, the rotary knob is used to
change the value.
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Frequency
o Range: 0 … 19.999 Hz
Amplitude
o Range: 0 and 4.000 mV
o When the offset output and the amplitude (Pk) output together exceeds
19.000 mVolt the Peak output LED will turn on and the amplitude value
will start flashing.
Offset
o Range: 0 mV … 19.000 mV or 0 mV … -19.000 mV
o When the polarity switch on the top of the IST-300 is set to negative the output is a
negative voltage. (see 3.4)
E.g. required for Eddy Current Probe loops using -24 volt power.
o When the polarity switch on the top is set to positive the output is positive voltage.
(see 3.4)
E.g. required for ICP sensors loops using 4 mA Power supply and 12 Volt Bias Voltage
3.4. Combined output
The 3 different parameters are combined into one output:
DC value + AC value are defining the voltage output. Either in RMS or PEAK depending on the
RMS/PEAK switch:
Figure 5 – RMS/Pk-Pk Switch
The output polarity may be changed at any time from positive to negative polarity or vice versa.
Figure 6 – Polarity switch
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Each value can be changed at any time by selecting the applicable LCD display and changing the
value by using the rotary knob.
Figure 7 – Rotary knob
Limitations are either the range values of each parameter or in case of clipping (see 3.5)
3.5. Clipping
When the offset output and the amplitude (Pk) output together exceeds 19.000 mVolt the Peak
output LED will turn on and the amplitude value will start flashing.
Figure 8 - Peak Output Function
In the example above the offset value + the RMS AC value exceed the 19.000 mVolt.
15.295 mV DC + (2.625 mV RMS * 1,414) = 19.007 m Volt
Note: The factor 1,414 is the square root of two (√2) which is the difference between the RMS and
Peak value for pure sinus shaped signals.
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4. Specifications
Digital Amplitude 14 bit:
0 … 4.000 mV Pk-Pk / RMS selectable
Accuracy:
100 mV + / - 3%
200 mV … 4000 mV better than + / - 1%
Digital Offset 16 bit:
0 … 19.000 mV + / - selectable
Accuracy:
Full range + / - 1%
Temperature drift:
30 µV/oC Typical
Maximum output current:
20 mAmp
Frequency range:
0 … 19.999 Hz
Tolerance:
@ 19.999 Hz < 0.001 % (+ / - 1 Hz)
Operating temperature range:
5 oC … 55 oC
Storage @95% humidity:
-10 oC … +80 oC with batteries removed
Battery:
ReCyko+ battery
▪ Holds power up to 90% after 1 year
▪ >8 hour continuously
▪ Rechargeable: NI-MH fast charge
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5. Declaration of conformity
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