halstrup-walcher REG 21 User manual

Instruction Manual
REG 21 Pressure
Regulator
halstrup-walcher GmbH
Stegener Straße 10
D-79199 Kirchzarten
Germany
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: www.halstrup-walcher.com
Document 7100.003674 07/2018

Instruction Manual REG 21
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Table of Contents
1Safety precautions ..........................................................................................................4
1.1 Appropriate use...............................................................................................................4
1.2 Shipping, assembly, electrical connections and start-up..................................................4
1.3 Troubleshooting, maintenance, repairs, disposal.............................................................4
1.4 Symbols..........................................................................................................................5
2Instrument description.....................................................................................................6
3 Start-up............................................................................................................................6
3.1 Features..........................................................................................................................6
3.1.1 Inputs and outputs...........................................................................................................6
3.1.2 Display elements.............................................................................................................7
3.1.3 Keypad............................................................................................................................7
3.1.4 Menue tree......................................................................................................................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
4Identification....................................................................................................................13
4.1 Included in shipment........................................................................................................13
4.2 Product labelling..............................................................................................................13
4.3 Models.............................................................................................................................13
5Electrical 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
6Start-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
7Troubleshooting ..............................................................................................................21
8Technical data.................................................................................................................22
9Dimension drawings........................................................................................................24
10 Certificate of Conformity..................................................................................................25

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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, 2015, 2018
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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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 non-
aggressive, 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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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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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
Fig. 1: basic circuit diagram
Power supply: Depending on the model, the power is supplied as either 230 V-AC,
115 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.
power supply
pressure
ports
analog output
switching output 1
switching output 2

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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 open-
emitter circuits.
Fig. 2 Transistor output (optional) a) open-collector circuit b) open-emitter circuit
3.1.2 Display elements
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.
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
Table 1
LED 1
LED 2
digital
input
digital
input

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Basic settings
Time constant
(1,2,5 and 10 sec.; Default: 1)
brightness
(1 to 15; Default: 5)
zero adjustment
(autom./manuell; Default: manuell)
Change the
parameters of
switching output 1
Change the
parameters of
switching output 2
Display of the
parameters of
switching output 1
Display of the
parameters of
switching output 2
Starting manual zero adjustment
Switch-on value
(0 to 100%; Default: 35%)
switch-of value
(0 to 100%; Default: 15%)
switch direction
(0 and 1; Default: 0)
Switch-on value
switch-of value
switch direction
Switch-on value
switch-of value
switch direction
Switch-on value
(0 to 100%; Default: 50%)
switch-of value
(0 to 100%; Default: 10%)
switch direction
(0 and 1; Default: 0)
3.1.4 Menue tree

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3.2 User functions
User functions include setting device parameters, displaying switching output
parameters and manually performing a zero-point calibration.
Users call up these functions by pressing the set keys; the specific function called up
depends on whether the keys are pressed individually or in combination, and for how
long they are pressed. Moving decimal points indicate that the instrument is no longer
displaying measured values (see fig. 7).
Function
parameter setting
Key sequence
Parameter
basic settings
press both and
hold for <2 s*
Time constant
Brightness
Zero adjustment
(see section 6.1)
setting parameters for
switching output 1
hold for >2 s**
Switch-on value
Switch-of value
Switch direction
(see section 6.1)
setting parameters for
switching output 2
hold for >2 s**
display functions
Key sequence
Values shown
displaying parameters
for switching output 1
hold for <2 s*
Switch-on value
Switch-of value
Switch direction
(Values are displayed one after the other.
The display then returns to the measured
value;see section 3.4)
displaying parameters
for switching output 2
hold for <2 s*
Other functions
Key sequence
Process flow
Start manual zero-point
calibration
depress
simultaneously and
hold for >2 s**
The zero-point calibration is performed
automatically. The display then returns
to the measured value.
* hold for <2 s: depress the key(s) until the decimal points on the measured value
display begin to move (see fig. 7 (2))
** hold for > 2 s: depress the key(s) until the “PPP” release code appears (see fig. 7
(3)).
Table 2 User functions for the REG 21 pressure regulator

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3.3 Device parameters
Several parameters are available for adapting instrument operation to a number of
different applications. Section 6.1 describes how to set parameters; table 3 provides
an overview of available parameters.
Parameter
Description
basic settings
time constant
the amount of time required for the display, analogue output and (if
the corresponding parameters are set) switching outputs to
respond to changes in pressure
brightness
display brightness
zero-point
calibration
automatic or manual zero-point calibration options
relay output 1
switch-on value
pressure threshold value that activates the switching output, see
section 3.4
switch-off value
pressure threshold value that disables the switching output, see
section 3.4
switch direction
parameter for selecting one of the two possible directions between
the two relay/transistor output states, see section 3.4
switching output 2 (analogous to switching output 1)
switch-on value
see above
switch-off value
see above
switch direction
see above
Table 3 parameters for the REG 21 pressure regulator