D2614-01-03 CN5819
DM650HM USER GUIDE
BATTERY POWERED %RH, °C/°F METER
WITH RELAY TRIP AND DATA LOGGING FUNCTION
Important - Please read this document before installing.
Every effort has been taken to ensure the accuracy of this document; however, we do
not accept responsibility for damage, injury, loss or expense resulting from errors and
omissions, and we reserve the right of amendment without notice.
IMPORTANT – CE, UKCA & SAFETY REQUIREMENTS
The instrument is designed to be directly attached to the sensor probe assembly.
Remote Probes may be used but the user must ensure all sensor and cable entries
maintain environmental protection to at least IP65 rating.
To maintain CE EMC requirements, input wires must be less than 3 metres.
The product contains no serviceable parts, or internal adjustments. No attempt must
be made to repair this product. Faulty units must be returned to supplier for repair.
This product must be installed by a qualified person. All electrical wiring must be
carried out in accordance with the appropriate regulations for the place of installation.
Before attempting any electrical connection work, please ensure the battery is
removed
ABSOLUTE MAXIMUM CONDITIONS (To exceed may cause damage to the unit).
Battery Voltage
± 3.7 VDC (Protected for over-voltage and reverse connection)
Ambient
Temperature (-30 to 70) °C, Humidity (10 to 95) % RH (Non-
condensing)
Relays
50 VDC 40 VAC RMS
Important – Read this
document before installing.
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1~DESCRIPTION
.
The DM650HM is a battery powered indicator with built-in sensors designed to
display % relative humidity, temperature, dew point and delta temperature. The
instrument offers an advanced display-mode, allowing the user to display not only
process variables but one or two (1–32) character messages. Additional to the
messages, the user may select an alert event to occur when the process is within a
band. The change-over relay can be used together with the messaging and alert to
provide switching at user-set points. In addition to this, on board datalogging is also
available to record process details at up to 5000 points.
2~RECEIVING AND UNPACKING
.
Please inspect the packaging and instrument thoroughly for any signs of transit
damage. If the instrument has been damaged, please notify your supplier immediately.
3~SPECIFICATION.
Refer to data sheet for full specification.
Factory default
Displays %RH, °C, relay not set
4~INSTALLATION AND WIRING
4.1~MECHANICAL.
The instrument is a high accuracy digital thermometer. In order to ensure correct
operation, the following must be observed:
The product must be stored in a dry clean environment and remain in original
packaging prior to installation.
The instrument must not be installed adjacent to electro-mechanical starters,
controllers, thyristor power units or electrical switch gear.
Any cleaning of the instrument must be done using a mild detergent and soft cloth. No
solvents or abrasive cleaners should be used.
Stated ambient operating conditions must not be exceeded. Battery life will reduce
with higher ambient temperature operating conditions.
4.2~ELECTRICAL.
For a wiring diagram please refer to the rear panel of the DM650HM inside the
case housing.
Connections: NO (Normally Open), NC (Normally Closed), and C (Common).
Two-part connectors are used for input and relay connections, allowing the unit to be
easily removed from the housing for reprograming or data download if this is not
possible in situ. On insertion of battery the unit will run through a power up check;
during this time the relay may change state.
IMPORTANT: Always remove battery before any wiring takes place. Gain access to
the connectors and battery holder by unscrewing the cap ring to release front panel
assembly from case.
RELAY CONNECTION: A relay with changeover contacts is available. Screw
terminals are provided for connection for wire size 16 to 20 AWG. The relay contacts
are rated at 48 VDC 28 VAC RMS @ 1 A (5 mA minimum current) see DM650HM
data sheet.
BATTERY: To remove battery, use screwdriver to ease the positive end of the battery
out of holder. Insert new battery negative end first then press into place. (Observe
polarity). Battery type 3.6 V Lithium (2.4 A/Hr) CR14505 (IEC) AA case style. Please
dispose of the battery in a responsible way.
5~USER CONFIGURATION.
IMPORTANT
READ COMPLETE SECTION BEFORE ATTEMPTING CONFIGURATION.
The instrument is provided with a USB interface for direct connection to a PC. Free
software USBSpeedLink is available. Please refer to the USBSpeedLink software for
further information on configuration. The software can be downloaded from
www.status.co.uk.
DISPLAY: The display provides six 14 segment characters for display of temperature
and alpha-numeric messages, together with an 8 segment bar graph and six icons.
The display can operate in an ambient temperature range of (-30 to 70) °C, but at
temperatures lower than -5 °C (due to the slow LCD speed) scrolled messaging is not
practical.
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8
1. NFC - The Symbol is on when a NFC field is detected. When a detected field is lost the symbol
will turn off after a few seconds.
2. TRANSMIT/RECEIVE: Symbol on when either NFC or USB communication is active.
3. USB: Symbol on when USB port is connected to a PC. Please note battery is not required during
configuration.
4. LOG: Not used
5. Not used
6. BAR GRAPH: Indicates the state of the logger. The condition is dependent on the selected
logger mode, either Single or Rolling mode.
Single Mode (Log to the maximum number of logs then stop)
Start of Log Mid Log End of Log (alternating)
Rolling Mode (Log to the maximum number of logs then as each new log is taken the oldest log is
discarded)
Start of Log Mid Log Rolled over Log (max bar toggles)
7. DEG: Degree symbol “°” used to indicate either °C or °F on the last digit.
8. DIGITS: Six-digit 14 segment display with – sign, range 9999.9 to -9999.9. Advanced mode offers
two temperature-dependent 32-character message options.
9. WARNING ICON: This symbol will toggle on and off to indicate a warning. The warning symbol will
be active either when the sensor signal is out of range, not connected or when the battery is low
