JUMO 202711/10 User manual

20271110T90Z001K000
V2.00/EN/00727307/2019-10-18
JUMO Simulator
for pH/redox
type 202711/10
Operating Manual

Contents
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Safety information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1.1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1.2 Warning symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1.3 Note symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2.2 Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 Identifying the device version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Order details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.3 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Connecting cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.2 Testing the input of a pH transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2.1 Transmitter settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2.2 Settings and steps for operating the simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.3 Calibrating pH transmitters and checking connected components . . . . . . . . . . . . . . . . . . . .10
4.3.1 Transmitter settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
4.3.2 Settings and steps for operating the simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
4.3.3 Allocating the current/pH value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.4 Testing the input of a redox transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.4.1 Transmitter settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.4.2 Settings and steps for operating the simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.5 Calibrating redox transmitters and checking connected components. . . . . . . . . . . . . . . . . .13
4.5.1 Allocating the current value/redox potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.6 Testing switch and controller outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
5 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Replacing used batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
6 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7 China RoHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4
1 Introduction
1Introduction
1.1 Safety information
1.1.1 General Information
This manual contains information that must be observed in the interest of your own safety and to avoid
material damage. This information is supported by symbols which are used in this manual as indicated.
Please read this manual before starting up the device. Store this manual in a place that is accessible to
all users at all times.
If difficulties occur during startup, please do not intervene in any way that could jeopardize your warranty
rights!
1.1.2 Warning symbols
CAUTION!
This symbol in connection with the signal word indicates that personal injury may occur if the respective
precautionary measures are not carried out.
NOTICE!
This note in connection with the signal word indicates that material damage or data loss will occur if
the respective precautionary measures are not taken.
1.1.3 Note symbols
NOTE!
This symbol refers to important information about the product, its handling, or additional benefits.

5
1 Introduction
1.2 Description
1.2.1 Intended use
The simulator for pH/redox is used for startup, for calibration, and for inspecting/troubleshooting pH and
redox transmitters.
1.2.2 Operating principle
The simulator is used to check that technical pH and redox measurement instruments are working cor-
rectly.
The simulator is used in place of a conventional pH/redox electrode and is connected to a measuring
amplifier. It enables you to check the laid connecting cable and the measuring amplifier.
Simulating the pH values 0 to 14 allows you to check and optimize the measuring amplifier outputs (dis-
play values, control contacts and analog/digital outputs) when the system is dry.
When using the simulator with redox measurement instruments, a potential of ±414 mV is simulated in
increments of 59 mV.
A switch allows a high-resistance check1 of laid connecting cables for shunts or humidity problems.
The pH simulator is operated using a 9-V battery2. There is an integrated test function for checking the
battery.
You connect the simulator to the pH or redox meter run using various optional connecting cables (see
chapter 2.3 "Accessories", Page 6).
1Impedance 1000 MOhm.
2Included in the scope of delivery.

6
2 Identifying the device version
2 Identifying the device version
2.1 Order details
2.2 Scope of delivery
2.3 Accessories
(1) Basic type
202711/10 JUMO simulator for pH/redox
(1)
Order code
Order example 202711/10
JUMO simulator for pH/redox, 9-V block battery, operating manual
Designation Part no.
Connecting cable for pH simulator 202711/10, BNC to BNC-connector, length 1.1 m,
for testing measuring devices with a BNC socket as the pH input
00082906
Connecting cable for pH simulator 202711/10, BNC to N-connector, length 1.1 m, for
testing the pH meter run from the electrode head (for standard electrodes with an N-/
S7-/S8-plug head), not suitable for electrodes with integrated temperature probes
00082906
Connecting cable for pH simulator 202711/10, BNC to Shield-Kon®(free cable end with
ferrule), length 1.5 m, for testing measuring devices with screw terminals as the pH in-
put
00513412

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3 Electrical connection
3 Electrical connection
3.1 Connecting cables
You can find suitable connecting cables for the device in chapter 2.3 "Accessories", Page 6.

8
4 Operation
4Operation
4.1 General information
NOTE!
Switch the device off again after use.
NOTICE!
A dirty or damp connection port can lead to incorrect measurements.
Protect the high-resistance connection port of the device during storage, so that it does not become
damp or dirty.
You switch the pH simulator on or off using the "ON/
OFF" switch. To switch it on, pull out the switch-
ing knob first (1) and then flick it upwards (2).
To switch it off, pull out the switching knob again and
flick it downwards.
You can test the internal battery using the "Batt.-
Test" push-button. If the battery is intact, the LED
lights up when you press the button.
The battery has an operating life of approx. 50 oper-
ating hours. A used battery can be replaced with a
standard 9-V block battery
(chapter 5.1 "Replacing used batteries",
Page 15).
(1)
(2)

9
4 Operation
4.2 Testing the input of a pH transmitter
4.2.1 Transmitter settings
Depending on the device configuration (manual temperature specification or automatic temperature
compensation), you first have to set the reference conditions for the temperature compensation on the
transmitter.
In the case of a manual temperature specification, you have to set the temperature to 25 °C.
In the case of automatic temperature compensation, the temperature of the connected temperature
probe must be adjusted to 25 °C. If this is not possible, an alternative solution is to connect a resistor of
110 Ω (Pt100) or 1.1 kΩ (Pt1000).
4.2.2 Settings and steps for operating the simulator
1. Test the battery of the pH simulator and visually in-
spect the connecting cable (coaxial cable).
2. Connect the simulator to the transmitter using the cor-
rect coaxial cable.
3. Switch on the simulator.
4. Set the simulator's output resistance to "Direkt" (1).
5. Turn the pH selection switch to "7".
The pH transmitter must display 7.00 pH +0.05 pH. If
necessary, correct the display using the zero point ad-
justment.
6. Turn the pH selection switch to "14". Wait until the val-
ue displayed on the transmitter is stable
The pH transmitter must display 14.00 pH +0.05 pH. If
necessary, correct the display using the slope adjust-
ment.
7. Set the simulator's output resistance to "1000 MΩ".
The displayed pH value is allowed to change by a max-
imum of +0.05 pH, and the output current by a maxi-
mum of 0.5 %.
8. Switch off the pH simulator (2).
2
1

4 Operation
10
4.3 Calibrating pH transmitters and checking connected components
4.3.1 Transmitter settings
Depending on the device configuration (manual temperature specification or automatic temperature
compensation), you first have to set the reference conditions for the temperature compensation on the
transmitter.
In the case of a manual temperature specification, you have to set the temperature to 25 °C.
In the case of automatic temperature compensation, the temperature of the connected temperature
probe must be adjusted to 25 °C. If this is not possible, an alternative solution is to connect a resistor of
110 Ω (Pt100) or 1.1 kΩ (Pt1000).
4.3.2 Settings and steps for operating the simulator
Example for the measuring range 2to12pH≙ 0 to 20 mA current output
1. Test the battery of the pH simulator and visually in-
spect the connecting cable (coaxial cable).
2. Connect the simulator to the transmitter using the cor-
rect coaxial cable.
3. Switch on the simulator.
4. Set the simulator's output resistance to "1000 MΩ" (1).
5. Turn the pH selection switch to "7".
6. Using the zero point adjustment, set the display of the
transmitter to 7.00 pH ±0.02 pH.
The value of the current output on the transmitter must
be 10 mA ±1 % (test using a measuring device).
7. Turn the pH selection switch to "2" or "12" (2).
8. Using the transmitter's slope adjustment, set the dis-
play of the transmitter to pH value 2.00 pH ±0.02 pH or
12.00 pH ±0.02 pH.
9. Check the zero point 7 pH again.
10. Check the linearity of the current output by turning the
pH selection switch from "2" (≙ 0 mA) to "12" (≙
20 mA). You can find the correct current values in the
diagram on the next page.
11. Switch off the pH simulator (3).
3
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