RLE FMS - Manual (Page 16)

SHEET: 16 OF 16
104 Racquette Drive
Fort Collins, CO 80524
(970) 484-6510 Phone
(970) 484-6650 Fax
www.rletech.com
FMS Sensor Wiring Guide 10061_FMS Rev 2.0 (8/13)
FMS Dwyer Temperature/Humidity Falcon Integration
Temperature Setup
Humidity Setup
1. Wire th e sensor as shown.
5. Ver ify the "Calc" Valu e d isp lays th e corre ct r oom tempera ture .
The tempe rature can also be viewed on the Falcon ma in page.
SETUP
1. Calculate the Dwyer Ou tpu t cu rrent for te mp erature.
TRO UBLESHOO TING
2. Measure th e curr ent flowing into the Falcon Ch- terminal with a
current me ter. Ver ify that it is close to the calcula ted curren t
(+/-1%)
3. If measured current curr ent do es not ma tch calcula ted curren t
then ch eck wi ring.
4. Compare the me asu red cur rent matches the cu rrent re ading in
the Fal con.
5. Check the wir ing if th e Falcon current readin g d oes no t match
the me asu red cu rrent re ading.
6. If th e Falcon current readin g matches the measured current
and the Fa lco n calculated value does not match the room
temperature then the offset and gain values are wr ong.
Double check the Gain and Offset va lues.
7. If th e tempera ture di spla ye d in the Fa lco n is 1 or 2 deg rees
abo ve or belo w th e r oom tempera ture then adju st the offset b y
1 or 2. Do not adj ust the ga in. Onl y tweak th e o ffse t once the
previou s tr oubleshoo tin g steps ha ve bee n p erfo rmed.
8. If th e Falcon still doe s not d isp lay the cor rect te mp erature
contact RL E Techno logies technical suppor t at 970.484.651 0.
9. Use similar tro ubleshoo ting pro ce dure excep t use the
following formula to calculate the humidity mA output.
mA =
Room Humidi ty
100
x 16 + 4
2. Configure the Fa lcon Input cha nnel (temperature) for "Ana log
4-20mA" and en ter the gain and offset valu es. For the -40 -
140F ra nge use G ain 45, Offset -85.
4. Configure the Fa lcon Input Ch annel (humidity) for "Ana log 4-
20mA" and en ter the Gain of 25 and Offset of -25.
4
5
3. For oth er temper atur e ra nges, use the Calculator fu nction on
the web page
3
5
2
Example if Room Te mp is 70F an d you r sensor has a ra nge of -40 - 140
( ( Act ual t emp - Sensor Low ) / ( Sensor High - Sensor Low )) x 16 + 4
( (70 - -40) / (140 - -40)) x 16 + 4 = 13.77
-40 - 140 Degree F Range
P1
VDC
TB 1
VDC
+ -
EXT ERNAL
24VDC
+ + Ch1
+ - Ch2
+ - Ch3
+ - Ch4
+ -
TB 2 Inp ut 1-4
Ch5
+ - Ch6
+ - Ch7
+ -
TB 3 Inp ut 5-8
Ch8
+ -
EXT ERNAL
GND
- -
TB 4
NC NO C
RELAY 1
NC NO C
RELAY 2
Figure 16.1: Falcon Wiring with the Dwyer
Temperature/Humidity sensor
1