Functional features:

Ø1. Fully automatic operation, manually or automatically calibrated and cleaned at selected intervals and times (1-7 days)

Ø2. The instrument has a low maintenance rate, with maintenance intervals of more than one month and each maintenance lasting about one hour

Ø3. The instrument can store 20000 pieces of data internally, without loss in case of power failure, and automatically overwrite the earliest data when fully stored

Ø4. The measurement cycle of the instrument is 55 minutes, and the time is adjustable to meet different measurement needs at different times

Ø5. Adopting TFT true color touch screen, 7-inch large screen, 70000 colors, 800 * 480 resolution, the instrument's working status is clear at a glance

Parameter indicators:

uMeasurement method: Salicylic acid spectrophotometric colorimetric method Execution standardsHJ 536-2009

uMeasurement range: （0～1）mg/l, 0～2）mg/l, 0～5）mg/l, 0～25) Automatic switching of four ranges of mg/l

uMaximum testing range:0～After automatic dilution at 300mg/l

uDetection limit:0.02mg/l

uResolution:<0.05mg/L

uMeasurement accuracy: Standard solution<5%Water sample<10%

uReproducibility:<5%

uReaction time:20 minutes, adjustable

uAccessible operation time:≥ 720h/time

uRange drift:±5%F.S.

uSample interval: continuous,1 hour, 2 hours... 24 hours, triggered, specified time point

uSignal output:4-20mA (20mA corresponds to adjustable range); RS485 and RS232 are optional