VTI 6289 Installation and operating instructions

VALTRONICS
R59 Zero Adjust
R58 Span Adjust 1
8
TB1
Green Power
Red Level Exceeded
Set Point
Adjust
R47 Coarse Zero
DO NOT Adjust R33 Sample Rate
DO NOT Adjust
R3
E1
E2
E3
JP1 shown in
FIXED position
Optional LCD
Display
J1
Set
Point
Relay
K1
9 pin "D"
Test Connector
J2
F1
0.5 Amp
Slow-Blow
Fuse
3 position
Fixed Level Detect
Switch S1
7
6
5
4
3
2
1
5
6
9
TB1
Model 6289 Wiring
3463 Double Springs Road • Valley Springs, CA 95252 • [phone] • FAX [phone]
Page 1 of 3 e-mail: [email protected] • Revised: : 10-May-01 © 1994-2001 VALTRONICS
0-5 V out pin 6to 5with DVM
to 4-20 mA input at
controller - DO NOT
connect 26 VDC
From 24VAC
transformer
The 4-20 mA current loop (pins 4 & 5) has its own 15
VDC internal power supply so NO External Power is
required in this loop. Pins 1, 2, 3, are the SET Point
Relay contacts - see the 6289 specification.
20.0 V min / 30 max
12 VA power rating
Level Detect Switch
Middle position is 1000
ppm or 2.5 volts. This
does not effect the
calibration of the sensor
just when the relay
energizes and the RED
indicator comes on.
Customers using an
HVAC controller to
monitor the 4-20 mA
output signal may not
use this function at all.
Placing the jumper JP1 in
the variable position E2
to E3 and adjusting
potentiometer R3 fully
clockwise will keep the
RED indicator OFF until
the level goes above 2000
ppm.
See Application Notes
A25 or A40 for info
about gas calibration
and page 2 for ZERO
on fresh air. Gas
calibration kits allow
you to flow certified
gas into the green
plastic cal tube at about
300 ml/min flow rate.
The tube should be
pinched off for normal
operation.
optional ground on pin 8
A minor ZERO adjustment
on fresh air of about 400 ppm
CO2may be necessary after
installation. Adjust R59
(ZERO) next to the RED
indicator for a 0-5 voltage
output of 1.0 volts for fresh
air. Try to assure that the air
is fresh inside the duct. DO
NOT adjust SPAN without
calibration gas.
The COARSE ZERO
adjust may be used to
center the fine zero
adjust R59 but adjust it
slowly. There is a 10
second delay in the
response.
Application Note A51
Model 6289 Wiring & CalibrationAdjustments
CAUTION: DO NOT connect a Model 6289 to the same
24 VAC transformer that powers an older Model 2088 or
2089 since they require a floating 24 VAC. TB1, Pin #8 on
the 6289 is grounded and this may burn out the 2088 or
2089 power supply.
8
7
6
5
4
3
2
1
24 VAC
TB1

PPM CO
2
Output V Max Min 4-20 mA Max Min
0 0.000 0.125 -0.125 4.00 4.4 3.6
50 0.125 0.250 0.000 4.40 4.80 4.00
100 0.250 0.375 0.125 4.80 5.20 4.40
150 0.375 0.500 0.250 5.20 5.60 4.80
200 0.500 0.625 0.375 5.60 6.00 5.20
250 0.625 0.750 0.500 6.00 6.40 5.60
300 0.750 0.875 0.625 6.40 6.80 6.00
350 0.875 1.000 0.750 6.80 7.20 6.40
400 1.000 1.125 0.875 7.20 7.60 6.80
450 1.125 1.250 1.000 7.60 8.00 7.20
500 1.250 1.375 1.125 8.00 8.40 7.60
550 1.375 1.500 1.250 8.40 8.80 8.00
600 1.500 1.625 1.375 8.80 9.20 8.40
650 1.625 1.750 1.500 9.20 9.60 8.80
700 1.750 1.875 1.625 9.60 10.00 9.20
750 1.875 2.000 1.750 10.00 10.40 9.60
800 2.000 2.125 1.875 10.40 10.80 10.00
850 2.125 2.250 2.000 10.80 11.20 10.40
900 2.250 2.375 2.125 11.20 11.60 10.80
950 2.375 2.500 2.250 11.60 12.00 11.20
1000 2.500 2.625 2.375 12.00 12.40 11.60
1050 2.625 2.756 2.494 12.40 12.82 11.98
1100 2.750 2.888 2.613 12.80 13.24 12.36
1150 2.875 3.019 2.731 13.20 13.66 12.74
1200 3.000 3.150 2.850 13.60 14.08 13.12
1250 3.125 3.281 2.969 14.00 14.50 13.50
1300 3.250 3.413 3.088 14.40 14.92 13.88
1350 3.375 3.544 3.206 14.80 15.34 14.26
1400 3.500 3.675 3.325 15.20 15.76 14.64
1450 3.625 3.806 3.444 15.60 16.18 15.02
1500 3.750 3.938 3.563 16.00 16.60 15.40
1550 3.875 4.069 3.681 16.40 17.02 15.78
1600 4.000 4.200 3.800 16.80 17.44 16.16
1650 4.125 4.331 3.919 17.20 17.86 16.54
1700 4.250 4.463 4.038 17.60 18.28 16.92
1750 4.375 4.594 4.156 18.00 18.70 17.30
1800 4.500 4.725 4.275 18.40 19.12 17.68
1850 4.625 4.856 4.394 18.80 19.54 18.06
1900 4.750 4.988 4.513 19.20 19.96 18.44
1950 4.875 5.119 4.631 19.60 20.38 18.82
2000 5.000 5.250 4.750 20.00 20.80 19.20
The following chart shows the signal output response, both 0 to 5 volt and 4-20 mA current
loop response to 0 to 2000 ppm by volume of CO2. Fresh air is about 400 ppm CO2so it
should give a response of about 1.0 volts or 7.2 mA in the current loop (the voltage output
drives the current loop). Please remember that no external power should be in the current
loop. It has its own internal +15 VDC power supply.
If you do not have a gas calibration kit you may adjust ZERO for a voltage output of about
1.0 volt in fresh air. Only adjust SPAN (R58) if you first adjust ZERO (R59) with nitrogen
flowing into the calibration tube for a voltage output of 0.00 volt. Then flow certified
1000±20 ppm CO2calibration gas at about 300 ml/min into the calibration tube for the
SPAN adjustment for a voltage output of 2.50 volts.
3463 Double Springs Road • Valley Springs, CA 95252 • [phone] • FAX [phone]
Page 2 of 3 e-mail: [email protected] • Revised: : 10-May-01 © 1994-2001 VALTRONICS
Application Note A51
Model 6289 Wiring & CalibrationAdjustments
Model 6289W
ZERO Adj.
SPAN Adj.
Calibration
hose barb
for 1/16 inch
ID tube
Caution: A person's breath may contain as
much as 3% (30,000 ppm) of CO2. Breathing
on the sensor may cause the output response
to peg beyond full scale. Even though fresh
air is about 0.04% (400 ppm ) CO2a room with
people in it will easily climb up near 1000
ppm or higher. See Application Note A41.
POREX™ porous cover
allows gas to diffuse into
the cell but prevents dust
and water droplets from
getting inside the gas cell

Replacement 0.1% CO2
SPAN Gas tank :
order# 0615
Replacement nitrogen N2
ZERO Gas tank :
order# 0616
3463 Double Springs Road • Valley Springs, CA 95252 • [phone] • FAX [phone]
Page 3 of 3 e-mail: [email protected] • Revised: : 10-May-01 © 1994-2001 VALTRONICS
23 by 8.5 inches Regulator,
0 to 500 ml/min
flow meter and
tubing
Notes:
• Field Calibration Kits consist of:
one tank with an 8 hour supply of 99.8% nitrogen (N2 )
one tank with an 8 hour supply of 1000 ppm (0.1%) CO2
a pressure regulator, flow meter, and carrying case
Concentrations of 0.1% (1000 ±20 ppm certified) CO2, 0.2%, 0.5%, 1%, 5%, and 15%
are in stock. These are all certified to be ±2% of reading.
• Replacement gas tanks are available for the CO2(order # 0615) & for N2(order # 0616).
These 14” high tanks contain 3.6 ft3or 103 liters @70°F and 1000 PSIG.
• Special gases and concentrations may be ordered with 3-6 week lead times
depending on the specific gas ordered.
• All volume discounts are based upon a single shipment