OAKTON 35700-00, 35700-10, 35700-20, 03313-70 Instruction Manual

OPERATING INSTRUCTIONS

OAKTON 35700-00, -10, -20 and 03313-70

Wall-Mount

Thermohygrometers

35700-00

03313-70

35700-20

Printed in the U.S.A. 01/02

35700-10

Introduction

Thank you for purchasing an OAKTON Thermohygrometer. You have one of four models. All models are ideal for monitoring relative humidity and temperature in laboratories, offices, greenhouses, food storage rooms, animal rooms, or computer rooms.

Operation

These thermohygrometers are maintenance free and do not require any special adjustments.

Models 35700-10, 35700-20, 03313-70

These models require no batteries or external power to operate.

Humidity adjustment (Model 03313-70 only)

To adjust or reset the RH, remove sticker to reveal opening with an inset screw. Use a screwdriver to adjust the RH. For increased accuracy, use a Hygrometer know to be accurate and adjust RH to match. See diagram.

Installation

Low cost thermohygrometer	Large dial thermohygrometer	Basic thermohygrometer
(model 35700-10)	(model 35700-20)	(model 03313-70)
		1/4"
7/8"	13/16"
		3
		/8"
15/	15
32"	/32"	1/4"
5/16"	5/16"

Thermohygrometer with digital thermometer (model 35700-00)

	Model 35700-00	Hook for
	includes a wall
		installing instrument	Hole for wall
	mounting bracket
			mounting or
	for permanent		mounting bracket
	mounting.
	Mounting with
	the bracket:
	1. Mount the bracket	Bracket
	on a wall with
	the screws.
	See diagram.
	2. Slide the holes on
	the back of the
	instrument over		Hole for wall
	the bracket hooks.	Hook for
			mounting or
	See diagram.	installing instrument	mounting bracket

		Back
Front

Model 35700-00	Front

Although the relative humidity scale requires no batteries or external power to operate, this model requires one 1.5 V AA battery to operate the digital thermometer.

To change the battery, open the lid on the back of the thermohygrometer and insert the AA battery (see diagram below). The positive (+) and negative (–) poles are shown at the bottom of the battery compartment.

Temperature selection (Model 35700-00 only)

This instrument is factory set to read temperature in °C. To change to °F, locate the switch under the vents on the back panel (fourth opening from the left). Move the switch to the left with a screwdriver. To return to °C, set the screwdriver into the third opening from the left and move the switch to the right. See diagram.

	PULL OPEN
C/ F	battery compartment
slide switch
Back

Precautions

1.Handle with care. Your instrument uses precise mechanisms to transmit the movement of the sensors. Rough treatment can damage the mechanisms.

2.Avoid direct contact with water and high levels of condensation. This instrument is not waterproof, and its vents are intended only for air circulation.

3.Because the thermometers are also made with precision parts, the instrument must not be stored in extreme temperatures. Avoid rapid temperature changes and strong physical shocks. The instrument must not be placed near heating units or in direct sunlight.

4.For accurate humidity readings, keep the instrument in a vertical position.

5.Dismantling the instrument can affect its accuracy.

6.Remove stains with a soft cloth and mild detergent.

7.Never use in environments that contain solvents like acetone, benzene, alcohol, or acids and bases.

Warranty

Oakton Instruments warrants this product to be free from significant deviations in material and workmanship for a period of 1 year from the date of purchase. If repair is necessary and has not been the result

of abuse or misuse within the warranty period, please return by freight pre-paid and amendment will be made without charge. The Customer Service Department will determine if the product problem is due to deviations or customer abuse. Out of warranty products will be repaired on a charge basis.

Return of Goods

Authorization must be obtained from our Customer Service Department before returning items for any reason. When applying for authorization, please include data regarding the reason the items are to be returned.

For your protection, items must be carefully packed to prevent damage in shipment and insured against possible damage or loss. We will not be responsible for damage resulting from careless or insufficient packing. A restocking charge will be made on all unauthorized returns.

NOTE: We reserve the right to make improvements in design, construction, and appearance of products without notice.

Specifications

Model no.

35700-10

35700-20

03313-70

35700-00

Low-cost Thermohygrometer

Large Dial Thermohygrometer

Basic Thermohygrometer

Wall mount Thermohygrometer

with digital thermometer

Relative Humidity

Range

25 to 80% RH

25 to 80% RH

20 to 99% RH

20 to 100% RH

Resolution

2.5% RH

5% RH

1% RH

2% RH

Accuracy

±5% RH from 25 to 70%

(at 15 to 25°C)

±5% RH from 25 to 70%

(at 15 to 25°C)

±3% from 20 to 50°C;

±4% from 20 to 90% RH;

±8% RH from 70 to 80%

±8% RH from 70 to 80%

±8% from 90 to 100% RH

Sensor

paper-coated metal coil

paper-coated metal coil

synthetic hair

human hair bundle

Temperature

Range

–4 to 104°F / –20 to 40°C

–22 to 122°F / –30 to 50°C

–4 to 120°F / –20 to 50°C

0 to 160°F / –18 to 72°C

Resolution

2°F / 1°C

2°F / 1°C

2°F / 1°C

0.1°F or °C

Accuracy

±3.6°F / ±2°C

±3.6°F / ±2°C

±3.6°F / ±2°C

±1.8°F / ±1°C

Sensor

metal coil

metal coil

alcohol-filled glass thermometer

solid state (digital) 3-digit LED

Power

none required

none required

none required

one AA battery

Dimensions

5" dia x 1"D

10.75" dia x 0.7"D

4.1" dia x 0.7"D

5" dia x 1.1"D

Shpg wt

0.3 lb

0.5 lb

0.3 lb

2 lbs

00703-05