CTH89 Series

6" Circular Chart
Temperature, Humidity, Dewpoint Recorder

• Advanced microprocessor Design for reliable operation

• Backlit LCD alphanumeric display

• All functions selectable from the front panel

• Battery backup for operation during power failure

• Alarm for over and under temperature or humidity

• Selectable alarm delay

• Audible and visual alarm indication

• Probe is field replaceable and calibrated with no special equipment

• Chart number displayed when time and temperature ranges are selected

• Selectable single or continuous chart rotation

• Low battery warning on display

• Fold away carrying handle

• Snap-on extra support legs

• Remote sensor

• Temperature/humidity or dewpoint/humidity recording

Primary power: 115 Vac, 50/60 Hz, 3.5 watts max. (220-240 Vac, 50/60 Hz. optional)
Backup power: 8 AA alkaline batteries (not supplied)for 48 hours continuous operation
Temperature accuracy: ±2°F (±1°C)
Relative humidity range: 0-100%
Relative humidity accuracy: ±3%
Dewpoint range: 32 to 120°F (0 to 50°C)
Dewpoint accuracy: ±2°F (±1°C)
Probe: Combined temperature/ humidity with 6' cable (consult sales for longer cable25' max)
Chart: 6-inch circular chart (supplied with 100 assorted charts)
Chart rotation speeds: User selectable 7 days, 24 hrs, 12 hrs, 6 hrs, 3 hrs, & 1.5 hrs.
Chart rotation: User selectable continuous or single turn
Chart speed accuracy: Better than 1%
Display: Alphanumeric Backlit LCD, 16 characters x 2 lines
Temperature alarm range: -20 to +120° (-30 to +50° C)
Relative humidity alarm range: 0 to 100% RH
Alarm delay range: User selectable: No delay, 10 min., 30 min., 1 hr., & 2 hrs.
Remote alarm connection: Normally open contacts 48 Vac/DC, 0.1 A Resistive load
Mounting: Vertical or horizontal --Free standing or wall mount.
Dimensions: 91Ž4" x 71Ž4" x 23Ž4" (23.5 x 18.4 x 7.0cm)
Operating ambient temp. range: 32 to 120°F (0 degrees to 49°C)
Weight: 4 lbs., 7 oz. (2013g)

To Order (Specify Model Number)

Model Number	Description	Price
CTH89	6" Circular Chart Temperature/Humidity or Dewpoint/Humidity Recorder 110 Vac Operation	$445
CTH89-220V	6" Circular Chart Temperature/Humidity or Dewpoint/Humidity Recorder 220 To 240 Vac Operation	455
CTH89-Pen-Red	Replacement Red Pen	10
CTH89-Pen-Blue	Replacement Blue Pen (Humidity)	10
CTH89-RP	Replacement Probe with 6 Ft. Cable	145
CTH89C-MIX	Mix Box of Assorted Charts (5 of each range)	19
CT89C-(*)	Replacement Charts (Box of 100) See range code below	19
MN1500	AA Batteries (pack of 2)	3

Each Unit comes with Red and Blue Pens, Box of 100 Assorted Charts, Probe with 6 Ft. Cable,
AC Adapter and Instruction Manual.

Don't forget the accessories! Please refer to the ordering matrix for a complete selection of charts and replacement pens.

(*) Chart Range Code	Record Time	Temperature Range
E20120F12	12 Hours	-20°F to +120°F
E20120F24	24 Hours
E20120F7	7 Days
E2050F12	12 Hours	-20°F to +50°F
E2050F24	24 Hours
E2050F7	7 Days
E40110F12	12 Hours	+40°F to +11°F
E40110F24	24 Hours
E40110F7	7 Days
E3050C12	12 Hours	-30°C to +50°C
E3050C24	24 Hours
E3050C7	7 Days
E3010C12	12 Hours	-30°C to +10°C
E3010C24	24 Hours
E3010C7	7 Days
E545C12	12 Hours	5°C to +45°C
E545C24	24 Hours
E545C7	7 Days

Recording Charts (use 12-Hr. Chart for 1.5 ­ 3 and 6-Hr. Speeds).

Ordering Example: CTH89C-E20120F12 Replacement Chart, 12-Hour record time,
­20°F to 120° F Range. Box of 100, $19.

U.S.A. and Canada International Callers; Sales & Service; 203.359.1660

Please E-Mail any comments or suggestions to OMEGA®. ® COPYRIGHT 1999 OMEGA ENGINEERING, INC. ALL RIGHTS RESERVED