Raytek CI1A, CI2A, CI3A, CI1B, CI2B Operating Manual

THERMALERT®CI

™

COMPACT INFRARED
SENSOR

OPERATOR’S GUIDE

TWO YEAR LIMITED WARRANTY

Raytek warrants this product to be free from defects in material and
workmanship under normal use and service for a period of two
years from date of purchase except as hereinafter provided. This
warranty extends only to the original purchaser (a purchase from
Raytek or Raytek’s licensed distributors is an original purchase).
This warranty shall not apply to fuses or batteries. Factory calibra­tion is warranted for a period of one year. The warranty shall not
apply to any product which has been subject to misuse, neglect,
accident, or abnormal conditions of operation or storage. Should
Raytek be unable to repair or replace the product within a reason­able amount of time, purchaser’s exclusive remedy shall be a refund
of the purchase price upon return of the product.

In the event of failure of a product covered by this warranty, Raytek
will repair the instrument when it is returned by the purchaser,
freight prepaid, to an authorized Service Facility within the applica­ble warranty period, provided Raytek’s examination discloses to its
satisfaction that the product was defective. Raytek may, at its
option, replace the product in lieu of repair . With regard to any cov­ered product returned within the applicable warranty period,
repairs or replacement will be made without charge and with return
freight paid by Raytek, unless the failure was caused by misuse,
neglect, accident, or abnormal conditions of operation or storage, in
which case repairs will be billed at a reasonable cost. In such a case,
an estimate will be submitted before work is started, if requested.

THE FOREGOING WARRANTYIS IN LIEU OF ALLOTHER WAR­RANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILI­TY, FITNESS, OR ADEQUACY FOR ANYPARTICULAR PURPOSE
OR USE. RAYTEK SHALL NOT BE LIABLE FOR ANY SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER IN
CONTRACT, TORT, OR OTHERWISE.

Rev J

05/00

56800-1

Raytek, the Raytek Logo, and Thermalert are registered trademarks and
CI is a trademark of Raytek Corporation

© Copyright 1996-2000 by Raytek Corporation

CI

THERMALERT SERIES

A full range of accessories for various applications and
industrial environments are available (see Figure 1).
Accessories may be ordered at any time and added
on-site. Also available is a J- or K-type thermocouple
connection kit and extension cables.

THERMALERT CI

The Thermalert®CI™Compact Infrared Sensor series
of online instruments are noncontact infrared tempera­ture measurement systems. They are designed to meas­ure accurately and repeatably the amount of heat ener­gy emitted from an object and to convert that energy
into a measurable electrical signal.

Each model (see Table 1) comes with a 1 m (3 ft) cable
and two mounting nuts and is designed for easy inte­gration into standard 4-wire systems. There are J or K
thermocouple output models or 10 mV/°C voltage out­put models if your application is susceptible to noise or
requires a long cable run. The electronics are protected
by a rugged NEMA 4 stainless steel housing.

2

1

ACCESSORIES

Table 1: Models

Figure 1: Accessories and Options

Model Output Accuracy

J Thermocouple

CI1A

K Thermocouple

CI2A

Voltage

CI3A

J Thermocouple

CI1B

K Thermocouple

CI2B

Voltage

CI3B

Overall

Temp. Range

0 to 350˚ C

(32 to 662˚ F)

30 to 500˚ C

(86 to 932˚F)

0 to 115˚ C (32 to 240˚ F)

larger of ±2% or ± 3˚ C (±6˚ F)

116 to 225˚ C (241 to 440˚ F)

larger of ±5% or ±6˚ C (±10˚ F)

226 to 350˚ C (441 to 662˚ F)

100 to 500˚ C (212 to 932˚ F)

larger of ±2 % or ±3˚ C (±6˚ F)

30 to 99˚ C (86 to 211˚ F)

larger of ±5% or ±6˚ C (±10˚ F)

>±5%

Adjustable mounting

bracket accessory

Fixed

Mounting nuts

(2 supplied)

Sensor

Air purge collar

accessory

Right angle mirror

accessory

Air/Water-cooled housing

mounting bracket

accessory

Sensor

with integrated air purge

(factory installed option)

OPTIONS

Options for various applications and environments
are available. Options are factory installed and must
be ordered with base model units. These include the
following:

• NIST traceable certification

• Air/Water-cooled housing (comes with integrated
air purging and high temperature cable)

• High temperature cable–260°C (500°F) maximum
ambient temperature (comes standard with
air/water-cooled housing option)

• Longer 3 m (10 ft) standard cable

3

SPECIFICATIONS

Table 2 (below and continued on Page 4) lists the sen­sor’s optical, thermal, operational, electrical, environ­mental, and physical specifications.

Continued on next page

Table 2: Specifications

4

Table 2 (continued): Specifications

65

Optical Chart

Figure 2 shows you how to read the optical chart. The
optical chart (Figure 3) indicates the nominal target
spot diameter at any given distance from the sensing
head and assumes 90% energy.

Figure 2: How to Read the Optical Chart

INSTALLATION

The installation process consists of the following:

• Preparation

• Mechanical Installation

• Electrical Installation

The most important part of the installation process is
preparation. Please read the following section thor­oughly before proceeding with the mechanical and
electrical installations.

Preparation

Distance and Spot Size—The size of the area (spot

size) you wish to measure determines the distance
between the sensor and the target (see Figure 3 for dis­tances and spot sizes). The spot size must not be larg­er than the target. Mount the sensor so the measured
spot is the same or smaller than the target. Figure 4 is
an overview of proper sensor placement.

Figure 4: Proper Sensor Placement

Figure 3: Optical Chart

Optical Resolution
Spectral Response Range
Thermal

Measurement range
Detecting element
Accuracy
Repeatability
Temperature coefficient

Operational

Temperature resolution
Emissivity
Response time
Warm-up period

4:1

90% energy

@

7–18 µm

See Table 1
Thermopile
See Table 1
±1% of reading

0.2˚ C per ˚C (0.2˚ F per ˚F)

< 0.5˚ C (1˚ F)
Fixed at 0.95
350 mSec (95% response)
< 1 minute

Electrical

Power supply voltage
Maximum current draw
Ripple
Output impedance
Minimum load impedance
Outputs

Environmental

Sensing head rating
EMI
Conducted noise immunity
Relative humidity
Storage temp. range
Thermal shock

Ambient operating range
air cooling
water cooling
water cooling/high temp cable

Physical

Dimensions

Weight
Material

Cable–Standard

Maximum ambient temperature
Material (type & color)
Cable length
Gauge

Cable–High Temperature

Maximum ambient temperature
Material (type & color)
Cable length
Gauge

12 – 24 VDC @20 mA

≤ 10 mA
≤ 2.5%

50 ohms
50K ohms
J or K thermocouple,
10mV/˚C Linear Voltage

IP 65, NEMA 4

IEC 801-4, Level 1
10 to 95%, non-condensing

-30 to 85˚ C (-22 to 185˚ F)
Max error of 5˚ C (for ∆T=25˚)
stabilization time=20 mins.
0 to 70˚ C (32 to 160˚ F)
0 to 94˚ C (32 to 200˚ F)
0 to 105˚ C (32 to 220˚ F)
0 to 260˚ C (32 to 500˚ F)

19 mm dia x 87 mm L
(0.75 in dia x 3.4 in L)
130 g (4.5 oz)
Stainless steel

105˚ C (220˚ F)
PVC, grey
1 m (3 ft)
AWG 24 (J, K t/c cable)
AWG 22 (10mV/˚C cable)

260˚ C (500˚ F)
Teflon, black
1 m (3 ft)
AWG 24

Target spot size
at focus point

Diameter of target
spot size in millimeters

Focus Point D:S = Distance to spot divided by spot diameter at the focus point
Far Field D:S = Ratio at distances greater than 10x the focus distance

Diameter of target
spot size in inches

Distance from sensor to
object in millimeters or meters

Distance from sensor
to object in inches or feet

GoodBest Incorrect

Sensor

Target greater
than spot size

Target equal

to spot size

Background

Target smaller
than spot size