RS PRO RS-135 User manual

Instruction Manual
RS-135
4-20mA Loop Calibrator & Thermometer

4-20mA Loop Calibrator & Thermometer / EN
This unit passes the following tests:
EN 61326-1 : 2013
Safety Symbols
Please read the statement thoroughly to prevent injury or loss
of life, and prevent damage to this product.
Earth (ground)
DC (Direct Current)
Conforms to relevant European Union
directives.

4-20mA Loop Calibrator & Thermometer / EN
Do not dispose of this instrument as unsorted
municipal waste. Contact a qualified
recycler for disposal.
Please remove all the test leads
before performing maintenance,
cleaning and battery replacement,
etc.

4-20mA Loop Calibrator & Thermometer / EN

4-20mA Loop Calibrator & Thermometer / EN
Table of Contents
FEATURES:.............................................................................................................1
APPLICATIONS: .....................................................................................................1
I. PANEL DESCRIPTION.........................................................................................2
II. OPERATION........................................................................................................7
1. VOLTAGE SOURCE....................................................................................................7
1a. 0~24V...................................................................................................................7
2. CURRENT SOURCE...................................................................................................9
2a. SOURCE (4~20mA, 0~24mA) ..........................................................................9
2b. LED Brightness Testing (0~24mA) ................................................................10
3. FREQUENCY SOURCE (HZ).....................................................................................12
3a. 3Vpp, 1~20KHz, Square Wave..................................................................... 12
3b. DUTY..................................................................................................................13
4. VOLTAGE MEASURE...............................................................................................14
4a. DC 0~24V ..........................................................................................................14
5. CURRENT MEASURE ..............................................................................................16
5a. DC 0.005~24mA............................................................................................... 16
5b. LOOP+ MEASURE and Supply 24V Loop................................................. 18
6. TEMPERATURE MEASURE......................................................................................19
6a. Measure TC Thermocouple Signals...........................................................19
6b. Select TYPE and Temperature units..........................................................20
III. SCANNING FOR SOURCE..............................................................................21
1. VOLTAGE SCANNING FOR SOURCE........................................................................21
1a. Functions of Voltage Scanning for SOURCE ..........................................21
1b. Connections and LCD displays for Auto-Ramp and Auto-Step.........22

4-20mA Loop Calibrator & Thermometer / EN
2. CURRENT SCANNING FOR SOURCE.......................................................................24
2a. Functions of Current Scanning for SOURCE..........................................24
2b. Connections and LCD displays for Auto-Ramp and Auto-Step.........25
IV. ELECTRICAL SPECIFICATIONS....................................................................27
V. GENERAL SPECIFICATIONS ..........................................................................30
VI.MAINTENANCE & CLEANING........................................................................31
LIMITED WARRANTY...........................................................................................32

4-20mA Loop Calibrator & Thermometer / EN
06/04/2018 Version No. 1 1
FEATURES:
1. Source 4~20mA, 0~24mA with 1μA resolution (1KΩ load, 24V loop supply),
basic accuracy 0.025%.
2. Source 0~24.000V with 1mV resolution.
3. Source frequency 1~20000Hz square wave with programmable duty cycle
(1~99%).
4. Auto step and auto ramp for sourcing mA, V.
5. Easy fixed 25% up and down, or programmable percentage (1~99%) increase
and decrease (mA, V).
6. Measure DC mA with loop power (24V output).
7. Measure DC V.
8. Measure Temperature (°C, °F) of 11 types of thermocouples (K, J, E, T, R, S,
N, L, U, B and C).
9. Calibrator grade precision temperature measurement with 0.1

C & 0.1

F
resolution.
10. Detection of thermocouples disconnection.
11. Source and Measure at the same time.
12. Warning for overload, output open (mA) or short (V).
13. Short circuit protection for output.
14. Battery power indication (%) when turn on the calibrator.
APPLICATIONS:
1. Calibration of 4~20mA panel meters.
2. LED brightness testing (0~24mA).
3. Temperature calibration of panel meters or instruments for 11 types of
thermocouples.

4-20mA Loop Calibrator & Thermometer / EN
2 06/04/2018 Version No. 1
I. PANEL DESCRIPTION
1. LCD display 5. Output terminal (+)
2. Function buttons 6. Output terminal (-)
3. Temperature input socket 7. V, mA input terminal (+)
4. Output function sliding switch 8. Input terminal (-)

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06/04/2018 Version No. 1 3
1. “MEASURE” symbol appears when under MEASURE mode.
2. HOLD symbol appears when MEASURE data is held.
3. Symbol indicates Auto-power-off.
4. This symbol appears when sub-functions of MEASURE are being used.
5. Low battery symbol.
6. Negative symbol for MEASURE value.
7. Symbol indicates the MEASURE is for DC.
8. Temperature units for MEASURE.
9. Status of MEASURE function.
10. MEASURE value display.

4-20mA Loop Calibrator & Thermometer / EN
4 06/04/2018 Version No. 1
11. “SOURCE” symbol appears when under SOURCE mode.
12. This symbol appears when sub-functions of SOURCE are being used.
13. Symbol indicates % step function output.
14. Symbol indicates 0~100% ramp scanning of output.
15. Warning symbol for Output overload (or there is no connection on SOURCE
terminals).
16. Symbol indicates the type of thermocouples.
17. mA Current output range.
18. SOURCE value display.
19. Symbol indicates “duty cycle” of frequency output.
20. % for step output or duty cycle % of frequency output (SOURCE).
21. Value display for %, or Battery power indication, or Sourcing percentage.
22. Status of SOURCE function.

4-20mA Loop Calibrator & Thermometer / EN
06/04/2018 Version No. 1 5
Buttons
Functions
Power on/off
SHIFT (black):
Select a range/function under MEASURE mode.
Hold the present value under MEASURE mode.
Keep pressing it and turn on the power at the same
time to disable Auto-power-off.
time to disable Auto-power-off.
Switch button for selecting MEASURE or SOURCE or
MEASURE+SOURCE.
SHIFT (blue): Select a function under SOURCE mode.
1. MEASURE mode: press SHIFT (black) and then
this button to enter DCV measure.
2. SOURCE mode: press it to enter number 1.
1. MEASURE mode: press SHIFT (black) and then
this button to enter DC mA measure.
2. SOURCE mode: press it to enter number 2.
1. MEASURE mode: press SHIFT (black) and then
this button to enter Temperature measure.
2. SOURCE mode: press it to enter number 3.
1. SOURCE mode (V, mA) : press SHIFT (blue) and
then this button to increase 25% (0% 25% 
50% 75% 100%).
2. SOURCE mode: press it to enter number 4.
1. SOURCE mode (V, mA) : press SHIFT (blue) and
then this button to decrease 25% (100% 75% 
50% 25% 0%).
2. SOURCE mode: press it to enter number 5.

4-20mA Loop Calibrator & Thermometer / EN
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1. MEASURE temperature range: press SHIFT (black)
and then this button to select the type of
thermocouples (K, J, E, T, R, S, N, L, U, B, C).
2. SOURCE mode: press it to enter number 6.
1. SOURCE mode: press SHIFT (blue) and then this
button to perform an Auto-ramp sourcing of whole
range. Press any button to stop Auto-ramp
sourcing.
2. SOURCE mode: press it to enter number 7.
1. SOURCE mode: press SHIFT (blue) and then this
button to increase % of the range.
2. SOURCE mode: press it to enter number 8.
1. MEASURE mode: press SHIFT (black) and then
this button to select the temperature unit (℃or
℉)
2. SOURCE mode: press SHIFT (blue) + this button to
enter DUTY cycle of output frequency.
3. SOURCE mode: press it to enter number 9.
1. SOURCE mode: press SHIFT (blue) and then this
button to decrease % of the range.
2. SOURCE mode: press it to enter number 0.
1. SOURCE mode: press SHIFT (blue) and then this
button to set up the increase/decrease % of the
range.
2. SOURCE mode: press it to enter decimal point.
1. SOURCE mode: press ENTER button after key in a
value.
2. SOURCE mode: press SHIFT (blue) and then this
button to enter Auto step sourcing; press them
again to enter Pause step sourcing.

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06/04/2018 Version No. 1 7
II. OPERATION
1. Voltage SOURCE
1a. 0~24V
1. Turn on the power. Turn the sliding switch to V.
2. Press M/S button to select SOURCE (output) mode.
3. Type in a voltage value (including decimal point); then press ENTER.
4. Connect the banana plugs of Test leads to SOURCE terminals (red to +,
black to -).
5. Then connect the other ends (prods or alligator clips) of Test leads to the
object for calibration.
6. Perform voltage SOURCE function (refer to the scanning operation).

4-20mA Loop Calibrator & Thermometer / EN
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Remark:
1. The max. output is 24.000V.
2. Type in a voltage value (including decimal point), press ENTER, then
the calibrator will output this voltage value.
3. When the output value is <1 and >0, please type in “0.”first.
Warning:
1. Do not make an input with voltage potential or connect any charged
circuitry to SOURCE (terminals) to prevent from damaging the calibrator.
2. When there is a short circuit or overload at the output terminals, the
calibrator can not output the correct voltage. Please remove connecting
leads and check when there is a symbol of OL.

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2. Current SOURCE
2a. SOURCE (4~20mA, 0~24mA)
1. Turn on power. Turn sliding switch to mA range (4~20mA) or mA (24).
2. Press M/S button to select SOURCE (output) mode.
3. Type in a current value (including decimal point); then press ENTER.
4. Connect the banana plugs of Test leads to SOURCE terminals (red to +,
black to -).
5. Then connect the other ends (prods or alligator clips) of Test leads to the
object for calibration.
6. Perform current SOURCE function (refer to the scanning operation).

4-20mA Loop Calibrator & Thermometer / EN
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2b. LED Brightness Testing (0~24mA)
1. Turn on power. Turn sliding switch to mA (24).
2. Press M/S button to select SOURCE (output) mode.
3. Type in a current value (including decimal point); then press ENTER.
4. Connect the banana plugs of Test leads to SOURCE terminals (red to +,
black to -).
5. Then connect the other ends (prods of alligator clips) of Test leads to
LED.
6. Perform current SOURCE function (refer to the scanning operation).

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Remark:
1. Users are allowed to type in max. 5 digits.
2. Type in a current value (including decimal point), press ENTER, then
the calibrator will output this current value.
3. When the output value is <1 and >0, please type in “0.”first.
Warning:
1. Do not make an input or connect any charged device to SOURCE
(terminals) to prevent from damaging the calibrator.
2. When there is an output open circuit or overload, the calibrator can not
output the correct current. Please remove connecting leads and check
when there is a symbol of OL.

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3. Frequency SOURCE (Hz)
3a. 3Vpp, 1~20KHz, Square Wave
1. Turn on power. Turn sliding switch to Hz range.
2. Press M/S button to select SOURCE (output) mode.
3. Press SHIFT (blue) and then to select DUTY% or HZ.
4. Type in a value (including decimal point) then press ENTER.
(If an unusual frequency value is typed in, the LCD will temporarily
display -- % which means the calculation inside takes a longer time.)
5. Connect the banana plugs of Test leads to SOURCE terminals (red to +,
black to -).
6. Then connect the other ends of Test leads to the object for calibration.

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06/04/2018 Version No. 1 13
Remark:
1. Users are allowed to type in max. 5 digits.
2. Type in each parameter (including decimal point), press ENTER, then
the calibrator will output the parameter values.
3. When the output value is <1 and >0, please type in “0.”first.
Warning:
1. Do not make an input or connect any charged device to SOURCE
(terminals) to prevent from damaging the calibrator.
2. When there is an output short circuit or overload, the calibrator can not
output the correct frequency.
3b. DUTY
DUTY: for a square wave, users can decide the band width of the positive
wave.

4-20mA Loop Calibrator & Thermometer / EN
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4. Voltage MEASURE
4a. DC 0~24V
1. Turn on power.
2. Press M/S button to select MEASURE (input) mode.
3. Press SHIFT (black) and then to select MEASURE DCV mode.
4. Connect the banana plugs of Test leads to MEASURE terminals (red to
V, black to COM). Then connect the other ends (prods or alligator
clips) of Test leads to the object for measurement.
5. LCD will display the DCV measurement value.