Halstrup Walcher REG 21 User Manual

Instruction Manual
REG 21 Pressure
Regulator

Document 7100.003674 Version 2.1 05/2009

halstrup-walcher GmbH

Stegener Straße 10
D-79199 Kirchzarten
Germany

Phone: [phone]
Fax: [phone]

E-Mail: [e-mail]
Internet: www.halstrup-walcher.com

Instruction Manual REG 21

Table of Contents

1 Safety precautions ................................................................................................................ 5

1.1 Appropriate use.................................................................................................................. 5

1.2 Shipping, assembly, electrical connections and start-up.................................................... 5

1.3 Troubleshooting, maintenance, repairs, disposal............................................................... 5

1.4 Symbols ............................................................................................................................. 6

2 Instrument description........................................................................................................... 7

3 Start-up ................................................................................................................................. 7

3.1 Features ............................................................................................................................. 7

3.1.1 Inputs and outputs .......................................................................................................... 7

3.1.2 Display elements............................................................................................................. 8

3.1.3 Keypad............................................................................................................................ 8

3.2 User functions .................................................................................................................... 9

3.3 Device parameters...........................................................................................................10

3.4 Switching behaviour.........................................................................................................11

3.5 Zero-point calibration ....................................................................................................... 12

3.5.1 Sequence of zero-point calibration steps...................................................................... 12

3.6 Overload protection.......................................................................................................... 12

4 Identification ........................................................................................................................ 13

4.1 Included in shipment ........................................................................................................13

4.2 Product labelling .............................................................................................................. 13

4.3 Models ............................................................................................................................. 13

5 Electrical connections and installation................................................................................. 14

5.1 Installation........................................................................................................................ 14

5.2 Instrument connections.................................................................................................... 14

5.2.1 Pressure ports............................................................................................................... 14

5.2.2 Electrical connections ................................................................................................... 15

5.2.3 Option light emitting diodes (LED) ................................................................................ 15

6 Start-up ............................................................................................................................... 16

6.1 Setting parameters........................................................................................................... 17

6.1.1 Overview of parameter setting functions and parameters............................................. 17

6.1.2 Launching a parameter setting function........................................................................ 18

6.2 Setting parameters........................................................................................................... 18

6.2.1 Notes on setting switching value parameters................................................................ 20

7 Troubleshooting .................................................................................................................. 21

8 Technical data..................................................................................................................... 22

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Instruction Manual REG 21

9 Dimension drawings...........................................................................................................24

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Instruction Manual REG 21

Purpose of instruction manual

This instruction manual describes the features of the REG 21 pressure regulator and
provides guidelines for its use.

Improper use of this instrument or failure to follow these instructions may cause injury
or equipment damage. All individuals responsible for operating this instrument must
therefore be properly trained and aware of the hazards, and must carefully follow

these operating instructions and the safety precautions detailed within. Contact the

manufacturer if you do not understand any part of this instruction manual.

Handle this manual with care:

 It must be readily available throughout the lifecycle of the instrument.
 It must be provided to any individuals who assume responsibility for operating the

instrument at a later date.

 It must include any supplementary materials provided by the manufacturer.

The manufacturer reserves the right to continue developing this instrument model
without documenting such development in each individual case. The manufacturer
will be happy to determine whether this manual is up-to-date.

Conformity

This instrument corresponds to the state of the art and meets all legal requirements
set forth in EC directives as evidenced by the CE label.

© 2002

The manufacturer owns the copyright to this instruction manual. This manual contains
data, instructions and drawings pertaining to the features and usage of this
instrument; copying this manual in part or in full or distributing it to third parties is
prohibited.

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Instruction Manual REG 21

1 Safety precautions

1.1 Appropriate use

The REG 21 pressure regulator is designed for measuring, displaying, monitoring and
regulating positive and negative overpressures and differential pressures of non­aggressive, gaseous media.

Always observe the operating requirements—particularly the permissible supply
voltage—indicated on the rating plate and in the “Technical data” section of this
manual.

The instrument may only be handled as indicated in this manual. Modifications to the
instrument are prohibited. The manufacturer is not liable for damages caused by
improper use or failure to follow these instructions. Violations of this type render all
warranty claims null and void.

1.2 Shipping, assembly, electrical connections and start-up

Do not close the pressure input ports when shipping, as changes in barometric
pressure could damage instruments with low measuring ranges.

Only technical personnel who are appropriately trained and authorized by the
operator of the facility may assemble the instrument and set up its electrical
connections.

The instrument may only be operated by appropriately trained individuals who have
been authorized by the operator of the facility.

Pressurized air or breath is not to be used for performance tests, as this could
damage instruments with low measurement ranges.

Measurement errors may occur if the instrument is not kept protected from sunlight.

Specific safety precautions are given in individual sections of this manual.

1.3 Troubleshooting, maintenance, repairs, disposal

The individual responsible for the electrical connections must be notified immediately
if the instrument is damaged or if errors occur.

This individual must take the instrument out of service until the error has been
corrected and ensure that it cannot be used unintentionally.

Always unplug the power cord before opening the instrument!

This instrument requires no maintenance.

Only the manufacturer may perform repairs that require the housing to be opened.

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Instruction Manual REG 21

The electronic components of the instrument contain environmentally hazardous
materials and materials that can be reused. For this reason the instrument must be
recycled in accordance with the environmental guidelines of the jurisdiction in
question once it has been taken permanently out of service.

1.4 Symbols

The symbols given below are used throughout this manual to indicate instances when
improper operation could result in the following hazards:

WARNING! This warns you of a potential hazard that could lead to bodily injury up

to and including death if the corresponding instructions are not followed.

WARNING: This warns you of a potential hazard that could lead to significant
property damage if corresponding instructions are not followed.

INFORMATION: This indicates that the corresponding information is important
for operating the instrument properly.

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Instruction Manual REG 21

2 Instrument description

The REG 21 pressure regulator measures differential pressures between its two
pressure ports, which lead to two chambers of a pressure measurement capsule.
Pressure is measured via a beryllium bronze membrane spring, which is displaced by
the pressure difference between the two chambers. Inductive displacement
transducers measure membrane deflection without contacting the membrane. The
instrument has no frictional parts or parts subject to mechanical wear, and performs
the following tasks:

 Displays the measured value

 Provides the voltage (current is also an option) proportional to the measured value.

 Its two switching outputs make it suitable for use as either a two-point or a three-point

controller

The following are some additional features worth highlighting:

 Overload protection

 Adjustable switching hysteresis

 High level of sensitivity

 High level of accuracy and long-term stability

 Automatic zero-point correction

 Low temperature dependence

3 Start-up

3.1 Features

3.1.1 Inputs and outputs

power supply

pressure
ports

Fig. 1: basic circuit diagram

Power supply: Depending on the model, the power is supplied as either 230 V-AC,

155 V-AC, 24 V-AC or 24 V-DC. The details of the supply voltage are given on the
rating plate.

Pressure ports: (-) port: reference pressure; (+) port: pressure to be measured.

The measurement range is given on the rating plate.

Analogue output: The instrument produces a voltage output proportional to the

measured pressure. Output is in the range of 0...10 V (ranges of -5…+5 V, 4...20
mA or 0...20 mA are optional). The spread of the analogue output values is
proportional to the measurement range. The type of analogue output is indicated on
the rating plate.

analog output

switching output 1

switching output 2

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Instruction Manual REG 21

Switching outputs 1 and 2: The instrument comes equipped with 2 relay outputs (2

transistor outputs are also an option). The type of switching output is indicated on
the rating plate. Switching outputs are triggered when values exceed and/or fall
below switch-on and switch-off values. See section 3.4 for a more detailed
description of switching behaviour. The instrument utilizes changeover relays and
bipolar NPN transistors, making it possible to create either open-collector or open­emitter circuits.

digital
input

Fig. 2 Transistor output (optional) a) open-collector circuit b) open-emitter circuit

3.1.2 Display elements

LED 1

LED 2

Fig. 3 Front view of the instrument

Display: The display shows the measured differential pressure or overpressure in

the units indicated on the housing next to the display. Positive values are displayed
as is; negative values are indicated by a preceding minus sign.

LED 1: LED 1 shows the status of switching output 1 and is illuminated whenever

the switch-on value exceeds or falls below that set for switching output 1 (see fig. 5).

LED 2: LED 2 shows the status of switching output 2 in a way analogous to that of

output 1.

digital
input

,

Table 1

3.1.3 Keypad

The instrument is set by means of 4 keys, whose functions are described in the
following:

Set key:

 Call up and exit parameter setting and display functions

 Save parameters

Enter key:

 Begin and end settings

 Select decimal places and +/- sign

Select key:

 Select values or parameters

 Set numerical values

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